Dan's 1984 TOYOTA 22R 4x4 (stock carburetor)

Hi all! With winter coming up, I need my choke working! It has never worked during my ownership and warming up this thing at five degrees from freezing temperature sucks (we're talking a 10 minute wait period, folks).

I understand the AAP, the choke "opener," and the choke breaker. BUT, what is it that actually forces the choke linkages/valve in their "cold start" position after you've floored the gas pedal twice?

I've been playing with the heating coil that mounts to the rear of the carburetor. I understand how it might help "open the choke" upon operating temperature (through electrically-induced heat), but I'm clueless as to what spring-like resistance eases the choke closed when starting her up at six in the morning.

I need MONDO help! Please! I've read the FSM, Chiltons, and have searched online everywhere that makes sense and I can't get a straight answer.

If you can make my choke work, I'd be forever in debt to you

Thankyou

 

On some carbs there is a fast idle screw. This controls the cold idle. I would say the thing that operates the choke is directly connected to the fast idle step cam(which the fast idle screw sits on) 85 FSM pages FU-17 and FU-18

 

It controls it by dropping the idle back down to 700 RPM. This device is called the choke opener. I need to know what the choke closer is: what it looks like, how to install it, and how to adjust it.

What makes the choke valve close?

 

There is no "choke closer". It's late so I'm not thinking 100% here but I think when the choke cam gets knocked down, it is directly linked to the choke valve and forceably closes it and locks the choke in place by the cam gettn knocked down to that 4th knotch.

If the system doesnt 'knock down' after warmup, its cuz A) the BVSV valve isnt working (stuck closed) or B) the choke opener diaphram is crap .. or combination of both.

Regardless, once you hit the throttle that choke should knocked (literally) down to the 4th knotch.

I think thats how it works at least. My best advice would be to pull out the FSM (throw that chilton and haynes manual into the firepit) and do the instructions for checking the choke opener. And watch closely how the choke linkage and cam act. I'm pretty sure its a mechinical linkage that restores the choke to a closed position.

 

85 fsm pages FU-19 to FU-21

check em out, maybe one of the levers is improperly bent or something is hampering their job.

 

There may be a spring on the cam wheel that closes the choke flap.